Transmission-housing-cover locking means



1'632 656 June 141927' c. L. JOHNSON K TRANSMISSION HOUSING OVER LOCKING MEANS Fi1ed Sept. 5, 1925- LEV ENID-FF? i Agear operatedmechanismsto lock the transmission gears y invention to provide a' 'locking means asso-y ciated with a transmission housing and thev f .COLVIN Patented .timev i4, 1927.

UNITEDSTATES PATENTOFFICE- t L. .iOiiNsoitl or S'r; LOUIS, "MISSOURI, AssIGNo'nf'ro JOHN LOCK oo., or slr.. LOUIS,,iviissoURLy A CORPORATION@ ILLINOIS. y

SON AiITOMOBiLE y `TnANsMIsSioN-iionSING-COVER LOCKING MEANS.

Appli*cation.filedl September 5, 1925'. Serial No. 54,727.

This invention relatesto means for preventing the; removal ,of transmission housing covers :except ivlien lthe transmission ygears are in a predetermined position. It is customary in ordei'lto prevent theft or un-` authorized ,use of auton'iohilesr and other thereof in apredetermined position by a suitable locking means.` Vhile such means' are highly successful in 'accomplishing their purpose, it is neverthelesspossible in certain casestoremove the transmission housing vcover and the'gear locking means after-Which the'geai's maybe shifted 'from `the predetermined positionl'as desired and the mechanism driven. y

Itis accordingly an object of the present invention to provide .a locking means for transmission housing covers which may only he released by shifting `the transmission gears fi'oina predetermined position.l y p It is also an important object of this cover'thei'eof, said locking means being `effective to pieventeithe'ilateraly or vertical movement `of I'the cover relative vto the housing" except vvhen'removed, th e: removal "th-ereof VVbeing yperniittedjonlyl lwhen 4the` gears in said housing are shifted atrom inoperative position." It is also a; very important object .covei lockinglnieansfivhich may he released fionlyiwhen the gears' are shifted from inopf erativepositionand' which maybe simply- *and` easily actuated -to-,Ypern'iit removal'of. i said cover when said gears are so shifted. l Y

Other and further important olojectsof this invention Willxhe apparent from the removed "disclosures in the Specification and theac- 'companying drawings.

` This invention (in a ypreferred. form) lis jillustrated inlthe drawingsand hereinafter "more fully described. i

' On the drawings:

" Figure l isa fragmentary,transverse sec-` tion -with parts removed` shoiving an embodi- ,mentl ofthe cover lockingmeans ofv rthis itis/inge Vportion which restsjon the'flange 2 and iivhich yis apertured to receive the inavchine sci'eivs. The cover 3 is also provided provide a t lansmission V'suitable position relative-to the gear shift pending, portion of the leverfS yislpi'ovided tral oi inoperative'ceiitral position." jfWhen: *the collar 9 is raised vhy the keyoperated" xmeans, thelugs` 12 will leave the aforemen- `6 to any desired operative position.` Oppo- As shown on thedraivingszi y u v i Reference numeral lf indicatesaftransmission housing which, is provided at its upper Vedge ywith an inwardly ,extending integral Viange 2 to which the ltransmission housing cover o is secured by means of machine 'screws lwhich viit into threaded recessest )extending vertically into the flange 12. The

transmission housing` 3' is provided ivithfawith a vcentral upwardly extendin-gdoine vportion which affords a Vuniversal support for a gear shi/ftlever 8,"the latter having 70 a AdependingA portion entendingA downwardly through the. interior ofthe l domey portion into the honsiiig'or casing* h/iiounted in the casing l and extending longitudinally `thereof are parallel rods 5 which havelolocks "T5V 6" slidahly mounted thereon. The adjacent faces oi' saidfhloclis V(3` have notchestorfrecesses formed therein adapted to receive 'the K' Vlower end of the dei'iending` 'portion' of the gear shift lever S and depending,` from said S0 `clocks and integral 'therewith are'geaiV shiftingl forks 7 which engage transmission gears Y-(not shovvn) in the casing to shift said gears l to plurality of predetermined positions. A-Vhe/n the .blocks G are'in the position shown in VFigure Zwith theiradjacentffaces opposite eachV other7 thegears ai'ejin neutraler inoperative position. A key 'operateilflocl'.- ing-means (not shown) L is /inounted .in a i le've'iB.- A, collar 9 isprovided surrounding' A the`depending'portion of the lever 8 Aand is adaptedto he raised or loweiedhy the key operated lochinpn` meanshy means of a vertical rod l0 connected therebetween. "The de- 95 recesses in the adjacentfaces of the blocks G for holding,- thef lever 8 securely innen-f tio'nedA recessesto release the `lever 8 so that the same may he actuated toshift the blocks i siteljv extending projections 13 are formed integral with the forks 7 which are arranged to selectively position the projections` adjacent the flanges 2 to confront a recess 1 -1 formed therein. The recesses 11 communicate with a vertically extending slot 15 which is adapted to receive a bolt 1T to be hereinafter described. Each slot 15 on the side opposite the recess 1-'1- is provided with a depending lug 1G. The flange portion of the cover 3 is apertured above the .slots 15 to receive therethrough bolts 17 which extend into said slots. Each bolt 1,7 is provided with a knurled or other suitable head 18 at its upper end and a` hook portion 19 at its lower end. Surrounding each bolt 1T beneath the head 1S theteof is a helical compression spring` 2O which engages beneath said head and abats a washer 21 also surrounding said bolt and resting on the flangeportion of the cover 3. rl`he bolt 1T is adaptedl to enter the slot 15 when the cover is placed on the flange Q. the hook portion 19v while entering extending inwardly. Each bolt 1T may after the cover 3 is positioned on the tiange 2, be turned about its axis to canse the hool; portion 19 to enter the recess 1+i for preventing subsequent removal of the cover 3 until said bolt has been again turned to bring said hook portion 19 ont of said recess. It will be seen, however, that since the projections 1S extend to adjacent the recess 1-1, thejv will preventy such taining of the bolt 17 to remove thehook portion 19 thereon from the recess 11 until said projections 13 have been shifted from neutral or inoperative position bv reason of shifting the block 6. But the block G cannot be shifted while the collar 9is in` lowered. position by reason of the key operated locking means. The function of the depending lug 16 is to prevent accidental oi: inadvertent engagement of the hook portion 19 under the side of the slot 15 opposite to. the recess 14. It will be apparent thatA this invention provides simple and eiiicient means for preventingthe removal of the transmission housing cover except when the gears in the housing are shifted from neutraly or inoperative position andi that when saidgears are locked in said position, saidcover will also be locked.

I am aware that man v changes majv be made, and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art. i I claim as my invention:

1.v The combination with a casing of gears mounted therein, means for shifting said 'housing cover and casina' gears, removable means on the casing to permit access to the gears when removed a spring pressed bolt member associated with said removable means and adapted to be actuated when in position to prevent the removal of said removable means, and means associated with said shifting means l'or holding said bolt in actuated position for preventing tlie removal of said removable means except when the gears are shifted..

Q. The combination of a transmission cover and casing, lsaid easing having a .slot beneath said cover, a rotatable member 't'reeljY extendible through said cover into said slot adapted to engage lsaid easing in a rotated position, gear shitting means within said casing and means associated therewith for holding said rotatable member in engaging position except when said gear ,shitting means shifted.

The combination with a transmission housing cover and casing, of gear shifting means in said casing, laterally projecting means on said gear shitting means, said casing havingl a recess positioned opposite to said projecting means when said gear shifting means is in a predetermined position, and a member movable from without for movement in and out of said recess for locking and unlocking said cover to said casing, said projecting means actingl to prevent movement of said member out ot' said recess.

1. rIlhe combination with a casing and removable cover thcrefor, ot gears mounted in said casing, means shiftable from a predetermined position for shifting said gears,

retaining means comprising a bool; member rotatable from without said casing and extending therein ior engagement and disengagement with said housing, and means associated with` said' shifting means for preventing rotation of said member except when said gears are shifted from said predetermined position.

kt. The combination with al transmission g, of gear shifting means in said easing, laterally projecting means on said gear shifting means, said casing having a shoulder beneath said cover positioned opposite said projecting means when said gear shifting means is in a pre determined position, and a member movable from without for engagement and disengagement with said shoulder for locking and unlocking said cover to said casing, said projecting means acting to prevent disengagement of said member with .said shoulder.

In testimonj7 whereof I have hereunto subscribed my name.

COLVIN L. JOHNSON. 

